Add Managers

[Foxtrek64]

closes #46

• [x] Add managers to locks
• [x] Add manager commands
• [x] Create action for adding/removing managers.
• [x] Modify trust action to allow managers to add/remove trusts
• [x] Treat managers as trusted on
  • [x] Key Locks
  • [x] Private Locks
• [x] Update Documentation
• [x] Add Phrases
  • [x] text.htm.untrust_manager
  • [x] text.htm.error.manager_not_trusted
  • [x] text.htm.trust_manager
  • [x] text.htm.error.manager_already_trusted
  • [x] text.htm.managers
• [x] Revert changes to build.grade and settings.gradle (not sure why Kotlin support was added)
• [x] Update InfoAction to display managers
• [ ] Add tests There is no testing library it seems, so this step is skipped